prEN 58

SLOVENSKI STANDARD
01-maj-2026
Bitumni in bitumenska veziva - Vzorčenje bitumenskih veziv
Bitumens and bituminous binders - Sampling of bituminous binders
Bitumen und bitumenhaltige Bindemittel - Probenahme von bitumenhaltiger Bindemittel
Bitumes et liants bitumineux - Échantillonnage des liants bitumineux
Ta slovenski standard je istoveten z: prEN 58
ICS:
75.140 Voski, bitumni in drugi naftni Waxes, bituminous materials
proizvodi and other petroleum products
91.100.50 Veziva. Tesnilni materiali Binders. Sealing materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2026
ICS 91.100.50 Will supersede EN 58:2012
English Version
Bitumens and bituminous binders - Sampling of
bituminous binders
Bitumes et liants bitumineux - Échantillonnage des Bitumen und bitumenhaltige Bindemittel -
liants bitumineux Probenahme von bitumenhaltiger Bindemittel
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 336.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 58:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Safety precautions . 5
5 Fundamentals of sampling . 6
6 Sample size . 7
7 Choice of sampling method. 7
8 Number of samples . 9
9 Arrangements, equipment and methods of sampling . 9
10 Further treatment of samples .13
11 Figures .16
Annex A (informative) Example of a form for reporting on the sampling of bituminous
binders – Unique sample identification .29
A.1 Data on material under examination .29
A.2 Data on delivery and use .29
A.3 Data on sampling .29
Bibliography .30

European foreword
This document (prEN 58:2026) has been prepared by Technical Committee CEN/TC 336 “Bitumens and
bituminous binders”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 58:2012.
a) in 3.9, the Note 1 to entry has been rephrased for better clarity;
b) in Clause 4 “Safety precautions”, item h) was added recommending to carry out a safety assessment
prior sampling operation and referring to product's SDS;
c) in Clause 7 “Choice of sampling method”, a safety warning has been introduced recommending to
avoid sampling in vicinity of open surfaces of liquid binder.
1 Scope
This document specifies methods of sampling bituminous binders, to determine the average quality of
the material under examination or to determine deviations from average quality.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12597, Bitumens and bituminous binders — Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12597 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
composite sample
sample made up by the mixing of several spot samples (3.9)
Note 1 to entry: A composite sample is regarded as a representative sample if the spot samples (3.9) are taken
according to a sampling plan that makes it probable that the composition of the composite sample approaches that
of the material as closely as possible.
3.2
divided sample
sample formed by dividing a spot (3.9), composite (3.1) or representative sample into several similar
parts by appropriate means
3.3
flowing material
material which flows in a transport pipeline or out of the drainline of a storage container
3.4
laboratory sample
sample intended for laboratory tests
Note 1 to entry: Preparation of test samples is specified in EN 12594 [1]
3.5
layer sample
upper, middle or lower layer spot sample (3.9) taken at a specific depth in a stationary material (3.10),
usually in order to detect segregation in large storage containers
3.6
main stream sample
sample taken from the outlet stream of a container, such that the entire cross-section of the outlet stream
is included
3.7
material under examination
entire quantity of the bituminous binder of which the properties are to be assessed
Note 1 to entry: “Material under examination” is termed simply “material” in the body of this document.
3.8
side-stream sample
sample taken from the outlet stream by means of a sampling probe
3.9
spot sample
sample, taken in a single operation at a single place and time
Note 1 to entry: If it can be assumed that the material is homogeneous, a spot sample is regarded as a
representative sample. If the material is not homogeneous, a composite sample shall be taken to ensure the sample
is representative.
3.10
stationary material
material in a storage container when all valves are closed and there is no flowing in the container
3.11
surface sample
spot sample (3.9) taken at less than 5 cm below the upper surface
3.12
test sample
sample produced by treatment or subdivision of a laboratory sample (3.4) during preparation in the
laboratory of the sample for individual tests
3.13
vertical straight-through sample
sample taken by drawing a sampling device through the total depth of the material under examination
(3.7) and thereby including all layers of the material
4 Safety precautions
The safety precautions given in this clause represent good practice and shall be applied in all cases where
they are not in conflict with local or other regulations that shall be followed.
The list of safety precautions given in this clause is not necessarily exhaustive and they should be
considered in conjunction with relevant national safety regulations or recognized safety code(s) for the
petroleum industry.
a) All regulations concerning entry into hazardous areas shall be observed rigorously.
b) Equipment shall be maintained adequately. Regular inspections of equipment should be carried out
by a competent person.
c) All equipment and access facilities shall be checked to ensure that they are adequate for safe working
before commencement of sampling.
d) Metallic sampling devices used in flammable atmospheres shall be constructed only from non-
ferrous metal(s).
e) Cords used as components of sampling devices shall be constructed only from vegetable fibre(s), e.g.
manilla or sisal; for emulsions, the cord used shall not absorb water from the emulsion.
NOTE Attention is drawn to the situation that, for cords made from man-made fibres, it is possible for an
operator to build up a dangerous level of electrostatic charge on his person, if he is not earthed and wearing
insulating gloves, and that certain man-made fibres can melt or dissolve in hot bitumen.
f) Precautions shall be taken to prevent the breathing of bitumen vapours during sampling operations.
g) For samples taken from the main stream, the sampling device shall be selected such that sampling
can be performed without pressure.
h) Prior to any bitumen or bituminous binder sampling operation, the hazards and risks associated with
handling the product should be assessed. This should include reference to the Safety Data Sheet (SDS)
of the product.
5 Fundamentals of sampling
5.1 Correct sampling techniques are a prerequisite to obtain meaningful test results.
5.2 The person taking the sample shall be experienced in the methods to be employed.
5.3 If the sample is to be subdivided, a suitably large representative sample shall be taken and divided
into the required number of divided samples.
5.4 A sampling report shall be prepared and signed by the person taking the sample.
The sampling report shall include:
a) the name and address of the manufacturer;
b) the name and address of the supplier (if different from manufacturer);
c) object of sampling (batch number, storage container, pipe identification);
d) the nature and type of material sampled;
e) the date and time of sampling;
f) the name of the sampler;
g) a unique identification of the sample(s);
h) the number and amount of samples;
i) the sampling method used;
j) reference to this document including its year of publication (i.e. prEN 58:2026);
k) any deviation, by agreement or otherwise, from the procedure specified in this document;
l) any special observations or any unusual features observed.
A prepared form shall be used for the sampling report (see example given in Annex A); a copy of the
sampling report shall be placed with each divided sample. Sampling reports shall not be put into sample
containers.
Because of the variety of materials for which the same container vehicle or storage tank can be used,
account should always be taken of possible contamination by residues, deposits or solvents. For this
reason, it is recommended to enter data in the report on the previous history of the container vehicle or
storage tank.
6 Sample size
Each divided sample should consist of at least 0,5 kg material.
NOTE The required size of a laboratory sample is dependent upon the nature and extent of the tests to be
carried out.
7 Choice of sampling method
The sampling method to be used depends upon:
a) nature, quantity and temperature of the material under examination;
b) number, type and size of the containers or cans from which the sample is to be taken;
c) whether the sample is to be taken from a stationary or a flowing material.
Arrangements, equipment and methods of sampling are described in Clause 9.
If samples shall be taken frequently from a large volume liquid material container, sampling appliances
such as sampling valves, sampling probes or three-way cocks can conveniently be installed permanently.
Otherwise, liquid test materials can be sampled by immersion techniques, for example, by weighted
sampling cans or bottom closing sampling tubes; materials fluid at low temperature can be sampled from
drums or containers of up to 2 m capacity by means of open sampling tubes. Table 1 gives an informative
guideline for sampling devices.
Very good care should be taken when taking samples of liquid bitumen or bituminous binders from open
surfaces by manual means, e.g. those described in section 9.2. An accurate hazard and risk assessment
should be carried out before any operations where exposure to emissions, e.g. H S from hot bitumen
might happen, and the appropriate working and protection measures be respected. It is recommended to
apply other means of sampling but those where manual operations are to be carried out in vicinity of
open surfaces of liquid binder.
Viscous, plastic and semi-solid material shall be sampled using tools of the kind described in 9.4, semi-
solid to brittle material by means of hand-operated tools described in 9.5 and granular material or lumps
according to 9.5 and 9.6.
Sampling from the main stream by disconnecting the pipe linking a container vehicle to a storage tank
shall not be carried out.
Table 1 — Sampling methods for material liquid
at either high or low temperatures in pipelines, containers or cans
Sampling from Sampling from containers of
Sampling method
pipelines capacity
3 3 3
In > 50 m > 2 m ≤ 2 m
Main Side
accordance > 800 m to to and
stream stream
3 3
with 800 m 50 m cans
sampling
9.1.2 - + - - - -
probe
Sampling
using from 9.1.3 - - + + + -
permanently sampling
9.1.4 - + - - - -
installed valve
equipment
3-way
9.1.5 + - - - - -
valve
weighted
sampling 9.2.1 - - + + + (+)
can
surface
sampling 9.2.2 - - - - + -
can
bottom
Sampling
closing
using 9.2.3 - - - (+) + +
sampling
immersion
tube
methods
open
sampling 9.2.4 - - - - - 0
tube
vertical
straight-
9.2.5 - - - - + +
through
can
Sampling
from
directly
spraying 9.3 + - - - - -
from
equipment
installations
Key
+ usable
(+) limited use
0 only usable for materials fluid at low temperature
- not applicable
8 Number of samples
The number of samples taken shall be dependent upon the size and form of the container and for
deliveries in cans and lumps upon the number of those in a delivery; the number of samples to be taken
from a container shall be as given for each sampling method in Clause 9.
For deliveries in cans and lumps, the number of cans or lumps from which samples are to be taken shall
conform to Table 2. Initially, one sample from each can or lump shall be tested. If this test shows deviation
from the specification, the remaining samples shall be tested.
If sampling is intended to check homogeneity (segregation) in stationary liquid material, at least three
layer samples (upper layer, middle layer and lower layer) shall be taken. They shall not be mixed to form
a composite sample.
If, in exceptional circumstances, it is desired to assess the average quality from layer samples, the
geometry of the container shall be taken into account.
Table 2 — Number of cans or lumps from which samples are to be taken
Total number of cans or lumps (n) Number of cans or lumps sampled
2 to 8 2
9 to 27 3
28 to 64 4
65 to 125 5
126 to 216 6
217 to 343 7
344 to 512 8
513 to 729 9
730 to 1 000 10
n , rounded to the nearest integer above,
over 1 000
where n is the total number of cans or lumps
9 Arrangements, equipment and methods of sampling
9.1 Sampling using permanently installed systems
9.1.1 Necessary drawing off before sampling.
Depending on the type of system (e.g. valve) used to take the sample and/or on the design of the unit (e.g.
sampling pipe) from which the material is sampled, a draw-off shall be performed to ensure that the
sample is a relevant and representative part of the material.
Each sampling point shall be assessed in order to define the minimum volume to be discarded and thus
to fulfil the requirement listed above; assessment shall be reported in an appropriate document. More
precisely, when a material draw-off is required (e.g. from a valve with dead volume, a long sampling
pipe…), the quantity/volume of material to be taken prior sampling shall be accurately evaluated.
Any drawn off material or any sample after use, may be recycled on site or elsewhere.
It is recommended to use valves or sampling systems with zero or minimal dead volume. With valves
having no dead volume, it is not necessary to draw off any material before sampling.
The sampling step on a running line shall be performed in accordance with all the appropriate safety and
health practices.
9.1.2 Sampling probe
If samples shall be taken from a flowing material, it is convenient to take side-stream samples using a
sampling probe installed in the delivery pipe. The sampling probe shall be installed in an upward-sloping
section of the pipe or on the pressure side of the pump, or in the case of a gravity-fed system in a
completely full section of pipe. The internal diameter of the sampling probe shall be less than 1/8 of the
internal diameter of the delivery pipe, and its opening shall be approximately central in the pipe facing
upstream. The sampling probe shall be equipped with a stop-valve. For very viscous material, it may be
advantageous to arrange for the movable parts to be totally immersed in the material. Figure 1 (for pipes
without pressure) and Figure 2 show examples of suitable arrangements; the arrangements shown in
Figures 1 and 2 shall be equipped with a protecting box in the sampling device.
Necessity to draw off material should be assessed (see 9.1.1).
If a representative sample is required, either sampling can be continuous, or spot samples can be taken
by opening the stop valve at equal time intervals throughout the period of flow.
This method is usable for flowing material. For a well mixed material, a spot sample, usually taken from
the middle third of the material, may be regarded as a representative sample. For material that is not well
mixed, a sample during the whole period of flow, or a composite sample formed from at least three spot
samples, shall be taken.
9.1.3 Sampling valve in container walls
Sampling valves in the walls of heated containers can advantageously be installed so that the movable
parts and the pipework are as far as possible within the heated material. Figure 3 shows a suitable
arrangement. For this arrangement, a simple cover shall be provided for the sampling device.
Necessity to draw off material should be assessed (see 9.1.1).
The sample shall be drawn off into a suitable clean container or bottle.
This method is suitable for all liq
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